الفهرس 
REVIEW OF LITERATUREOnly 14 pages are availabe for public view
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Abstract
The present study aimed to investigate the effect of inoculation with arbuscular mycorrhizal fungi as phosphate solubilizer and Hundz soil (HS) and seaweed extract (SE) as soil conditioners on growth, yield and chemical constituents of common bean plants under drought stress. Two field experiments were conducted, for the two growing seasons of March 2013 and 2014 in a clay soil at the Farm of Faculty of Agriculture, Ain shams Univ.
Two samples were taken after 60 day / from sowing and at harvest time. In the first sample, the following growth parameters were determined: plant height, leaves number per plant, leaf area, leaves fresh and dry weight, distance of plants (shoot diameter), number of branches, branches fresh and dry weight, and leaf area. Also, yield components measured were: average number of pods, the average length of pods, the average diameter of the pods, pods fresh and dry weights, weight of yield of common bean plant. The weight of 100 seeds, seeds yield per Fed, seed size and number of pods falling, seeds E.C., total soluble carbohydrates, total nitrogen and total proteins contents, P and Ca concentrations were recorded in the seeds of common bean. At the 2nd samples date (Harvesting time) Results of the present study can be summarized in the following:
I- Growth parameters
1. The HS, SE and mycorrhiza have led to a significant increase in plant height and leaves fresh and dry weights. The highest values of plant height were achieved in HS and SE in both seasons at 60 days from planting.
2. The HS, SE, mycorrhiza have led to increase in leaves fresh and dry weights in both seasons at 60 days from planting compared to control treatment.
3. HS and the interaction between mycorrhiza and SE treatments gave the best increment of fresh and dry weights in both seasons.
4. All treatments and their interactions showed stimulated effect in leaves number per plant and leaf area in both seasons.
5. The HS, SE and mycorrhiza have led to a significant increase in branches fresh and dry weights in both seasons at 60 days from planting comparing with the control.
6. HS and the interaction between mycorrhiza and SE treatments gave the best increment of fresh and dry weights in both seasons.
II. Yield components
1. The HS, SE and mycorrhiza have led to a significant increase in pods number per plant. HS and SE gave the highest values of pods number per plant, as compared to the control and rest treatments in both seasons at 60 days from planting.
2. All treatments and their interactions showed stimulated effect for pod length in both seasons, and the superiority was in HS and SE treatments.
3. Pod fresh and dry weights and pod diameter were significantly increased by HS and SE treatments at 90 days from sowing in both seasons.
4. The HS, SE and mycorrhiza have led to a significant increase in number of seeds per pod and the yield of plant in both seasons at harvest day, compared to control. HS and the interaction between mycorrhiza and SE treatments gave the best increment of number of seeds per pod and the yield of plant in both seasons.
5. All treatments and their interactions showed stimulated effect in average number of seeds per plant and seeds yield per fed in both seasons. The superiority was due to HS and SE treatments in this concern in both seasons at harvest day.
6. The HS, SE and mycorrhiza have led to a significant increase in size of 100 seeds. SE gave the highest values of in this concern as compared to the control and rest treatments in both seasons at 60 days from planting.
7. The HS, SE and mycorrhiza have led to a significant increase in the weight of 100 seeds in both seasons at harvest day compared to control. SE and the interaction with mycorrhiza treatment gave the best increment in weight of 100 seeds compared to the rest treatments in both seasons.
III. Chemical constituents
1. All treatments and their interactions showed stimulated effects on total chlorophylls reading in leaves of common bean plants at 60 days from planting in both seasons. SE and the interaction with mycorrhiza treatments have led to the highest value of total chlorophylls reading in both seasons.
2. All treatments led to significant increases in proline concentration in the second season compared with the control and in the first season at 60 days from sowing. SE treatment recorded the highest value of proline concentration in leaves of common bean plants in both seasons, compared to other treatments.
3. The HS, SE and mycorrhiza treatments gave a significant increase in nitrogen concentration and total protein content as compared to the control in both seasons. The highest values of protein and nitrogen were observed by HS and SE in both seasons at harvest day.
4. All treatments caused significant increases in total soluble carbohydrates in common bean seeds as compared to the control plants in both seasons at harvest day. The highest significant values were recorded by the SE treatment.
5. All treatments produced a significant increase in phosphorus content as compared to the control. Mycorrhiza treatment and its interaction with HS and SE treatments gave the highest significant values of phosphorus concentration of common bean seeds at harvest day.
6. Same trends in calcium concentration in common bean seed were recorded by treatments at harvest time in both seasons.
Finally, it could be concluded that the HS, SE and mycorrhiza treatment all have led to increase common bean tolerance to drought conditions. HS and SE treatments caused very good results in this study.